stockpiled dairy manure

Stockpiling is one way of storing
solid manure until it can be applied to cropland as fertilizer.
The first and most important thing is that stockpiling must
follow federal, state, and local rules pertaining to manure
stockpiling. Two types of stockpiling: short-term (less than one
year) stockpiles and permanent stockpiles. General rules for
stockpiles state that “they must be located and constructed such
that manure-contaminated run-off from the site does not
discharge into the waters of the state”. As mentioned before,
the stockpile must also contain at least 15% solids. This
eliminates the possibility of stockpiling true liquid manure.